ج, چ, ح, خ all share the same curl. The dot, or its absence, is what tells them apart. Teach jeem first because the dot below is the most stable cue: it sits inside the curl, protected. The stroke timing is approximate; what matters is the curl drops below the baseline before the dot goes in.

The first jeem your child writes is often the name of someone they know: Junaid, June, Jinnah. Say the name out loud as they trace. The letter belongs to people in their life, not to a worksheet.