Why no tram lines in Sassoon fonts?

The reasons are discussed in the books by Rosemary Sassoon.
Briefly, each child has a slightly different size of hand which affects the comfortable range of handwriting movement. Providing tram lines pressures the child into modifying this comfortable range and whilst it may initially help, very quickly, the child will resort to what is most comfortable. The result will be that handwriting will overshoot tram lines that are too close together, while tram lines too far apart will be ignored.

A baseline is all that is required.

For this reason we have created Sassoon Primary Infant Line (item 661) for Schools/Teachers and Parents.
and
Sassoon Infant Line (Item 681) for Companies and Individuals

Club Type products by Adrian Williams Design Ltd. Last updated 5 June 2008
Webmaster: adrian@clubtype.co.uk