While many aspects of ScratchJr can provide such a range
of complexity, some tools and features aord less
exibility,
and kindergartners and second graders may need incompat-
ible designs. In these instances, a middle-ground solution
was chosen as a starting point for testing, aiming to allow
older children room to explore without shutting out younger
children. For instance, children across early kindergarten to
late second grade are comfortable with very dierent ranges
of numbers. Although there are many possible solutions
to this issue, the decision was made to set fairly low num-
ber parameter boundaries (under 25) in the initial ScratchJr
prototypes. Second graders are ready to explore higher num-
bers, but the benet to older children would be oset by the
challenge posed to younger children.
While many aspects of ScratchJr can provide such a rangeof complexity, some tools and features a ord less exibility,and kindergartners and second graders may need incompat-ible designs. In these instances, a middle-ground solutionwas chosen as a starting point for testing, aiming to allowolder children room to explore without shutting out youngerchildren. For instance, children across early kindergarten tolate second grade are comfortable with very di erent rangesof numbers. Although there are many possible solutionsto this issue, the decision was made to set fairly low num-ber parameter boundaries (under 25) in the initial ScratchJrprototypes. Second graders are ready to explore higher num-bers, but the bene t to older children would be o set by thechallenge posed to younger children.
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