A rough rule of thumb: many “component skills” (e.g. writing a grammatically correct sentence, properly punctuated) can be performed as fast as you can write or type, assuming you write or type very quickly. I type 110 wpm, and I can write sentences at that rate.
Frequency aims for handwriting, sentence combining, and college-level reading:
|Handwriting (or typing)||180-160 letters or punctuation marks per minute|
|Sentence combining||25 to 20 words combined into grammatically correct, properly punctuated sentences in 3 minutes; no mistakes|
|College-level reading||250 to 200 words read out loud with no more than 1 or 2 errors per minute|
Precision teaching materials always put the high aim first, so I am following suit.
Timing charts and instructions here.