£190 - Dual Tutor Course

Including UK VAT*

What You Will Learn

Join Bob Leatherbarrow and Amanda Simmons in an exploration of deep forms in glass during this collaborative masterclass. Amanda and Bob have put their heads together to share their approaches, experiences, and strategies to help you take your work to new depths. They will demystify the process of slumping glass, slumping schedules and achieving deep forms. 

You will see demonstrations of the artists' work illustrating these new concepts, and practice projects based on these techniques.

This workshop is intended for artists who have deep-chambered kilns, but those without can also adapt projects for their own kilns, learning a lot about kilns, schedules, and the behaviour of glass.

 You can view more of Bob's work here: www.leatherbarrowglass.com

You can view more of Amanda's work here: www.amandasimmons.co.uk

Materials List - Deep Forms with Amanda and Bob April 2023.pdf

Duration and Place

Duration: 3 weeks - a total of 6 hours

Online Course

Please note that classes may be slightly longer or shorter depending on student questions.

Session times

  • Wednesday 6th March 2024 - 5.30 pm-7.30 pm UK time (2 hours)
  • Wednesday 13th March 2024 - 5.30 pm-7.30 pm UK time (2 hours)
  • Wednesday 20th March 2024 - 5.30 pm-7.30 pm UK time (2 hours)

Class Description

Successfully achieving deep shapes is one of the greatest challenges in kiln-formed glass; the deeper the shape the greater the challenge.

Learn four approaches to surmount this challenge by:

  • Understanding how glass behaves during slumping; designing reliable custom slumping schedules
  • Demystifying how best to use drop-out and deep-form step moulds
  • Develop simple and economic ways to create distinctive shapes by making your own moulds.
  • Get ready to think outside the box but inside the kiln!

Workshop Outcomes:

  • Slumped Glass Works
  • Drop Ring Vessels
  • New Knowledge of Slumping schedules

How it works:

  • The course is made up of three live and interactive online sessions using the Zoom platform. You will find the zoom link via the week chapters in the navigation panel. 
  • Bob and Amanda will teach you the techniques via our live online classroom.
  • They will provide a step-by-step tutorial and you will have ample opportunity to ask questions during the sessions. You do not make pieces during the live session.
  • Each week they will demonstrate a technique to try yourself during the week between sessions, you are also able to contact them if you have any questions between sessions.
  • A member of the Glass School team will also be online to assist you and the teachers.
  • Mix with Bob, Amanda, and other students on our dedicated community page, open for the duration of the course. Then join our exclusive Glass School UK Online Glass Community Facebook group to continue to mix with those who have attended any of our online masterclasses.
  • A materials list is provided in the course navigation panel, so you can purchase what you need to create your pieces during the course. You don’t need absolutely everything on this list to be successful, Bob and Amanda will discuss different ways to reach our technical goals

We believe that this is the best way to get the very most from the course, but if this doesn’t suit you that’s fine: - If you can’t get to your studio, you can still learn the techniques and benefit from Bob, and Amanda's extensive knowledge without making the pieces during the course itself.

This is a live online masterclass, but in case a student experiences issues with internet connection during the live class, a recording of each live session will be available to view until two weeks after the final session. This cannot be downloaded or shared and is only available for this limited time. By participating you agree to be recorded for this purpose.

These recordings will be available in the course navigation panel. 

What to Prepare

  • You will need a computer, tablet, or phone with a camera and microphone in order to join the online classroom. If you are unfamiliar with using Zoom then please take some time to look at our guide, available in the navigation panel. 
  • You should have a reliable internet connection, fast enough to make video calls or stream videos
  • Please read the Student Participation Agreement
  • Ensure that you have checked the materials list and purchased any materials you may require 
  • A pen and paper to take any notes. 
  • We restrict the class size to 25 people
  • We teach using Bullseye Glass (CoE90)


We are committed to maintaining a respectful community where all our students can learn and develop their full potential, within a safe environment.

If you have a learning difference or any specific requirements, please do not hesitate to contact us prior to your lesson so we can accommodate you.

*Price excluding VAT is £158.33. The correct tax will be calculated at checkout based on your location.

Cancellations up to 2 weeks before the course receive a 90% refund, after that date, a 50% refund will be given up to one week prior to the course, and no refund is given for cancellations after this time. In order to keep class costs low for all, we make no exceptions to this policy. In order to cancel your place on the course please contact [email protected] 

Course Curriculum

    1. Welcome

    2. Course Overview

    3. Student Participation Agreement

    4. Join the Community!

    5. How to Navigate the Community Page

    6. Materials List

    7. How to Download your Materials List!

    8. A Guide to Zoom and the Live Session

    9. All Set for the First Session!

    1. Welcome to Week One

    2. Old Week One Handout - Amanda Simmons

    3. New Week One Handout - Amanda Simmons

    4. Course Handout - Bob Leatherbarrow

    5. Zoom Link - Week One - Deep Forms - Wednesday 6th March 2024

    6. Week One - Recording

    1. Welcome to Week Two

    2. Week Two Handout - Amanda Simmons

    3. Zoom Link - Week Two - Deep Forms - Wednesday 13th March 2024

    4. Week Two - Recording

    1. Welcome to Week Three

    2. Week Three Handout - Amanda Simmons

    3. Zoom Link - Week Three - Deep Forms - Wednesday 20th March 2024

    4. Bob and Amanda's Presentation

    5. Week Three - Recording

    1. Submit Your Finished Works

    1. Thank You for Taking Part

    2. Feedback

Amanda Simmons

Amanda makes kilnformed glass objects, playing with gravity in the kiln. Manipulating mass, heat, colour and time, she creates complex, elusive work that has intense colour and pattern which reacts to the light it is placed in. She uses opaque glass powders to construct her work because of its varying translucency as the form elongates in the kiln, then finishes the kiln fired pieces using many coldworking processes to shape and mark the glass including sandblasting, hand lapping and diamond point and wheel engraving. Amanda graduated from Central St Martin’s School of Art & Design in London with Distinction studying Postgraduate Certificate in Glass & Architecture, before relocating to Dumfries & Galloway, Scotland in 2005. She has exhibited in many high profile national and international exhibitions.

Bob Leatherbarrow

Bob Leatherbarrow established Leatherbarrow Glass Studio in Calgary in 1988 and has created original kilnformed glass ever since. Known for his innovative styles, techniques, and designs, Bob has taken an experimental approach to developing unique textures and colour palettes using glass powders. His kilnformed glass bowls and sculptures explore the subtle hues and delicate beauty of naturally occurring textures and encourage the viewer to ponder their origin. In 2008 Bob moved his studio to Salt Spring Island, British Columbia where he now makes glass art and writes e-books on his signature techniques. Bob has been a popular guest instructor on both the national and international kilnformed glass scenes.

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Learn this unique technique and take your glass work to the next level