Separate but equal?

Why is is that teachers think classroom projects are appropriate when not all can participate? Or the class exercise if fine if one student is singled out because they have to use different, separate materials?

The Home & Careers classroom project is to read food labels, but not just the labels - she uses the whole package. The teacher wants to use what she already has but can't attest to them being safe for him to handle (such as her granola bar labels which have a ton of nuts in them]. Although we asked that labels being used would be safe for everyone, she thought it best he bring in his own. So here we go again, the "separate but equal" bullshit.