Themes	Sub-themes	Codes	Barriers/Facilitators
Features of the screeners	Duration	Only one session to complete	Facilitator
		Quick	Facilitator
	Features of items	Concern about distribution of answer choices	Barrier
		Could only select answer after repetition	Barrier
		Developmentally appropriate	Facilitator
		Different functionality between practice and test items	Barrier
		Items advanced too quickly	Barrier
		Language level was too difficult	Barrier
		Content	Facilitator
	Format	Automatically paced	Facilitator
		Digital	Facilitator
		Efficient	Facilitator
		Prefer paper/pencil	Barrier
		Simple format	Facilitator
		Standardized	Facilitator
	Result turnaround time	Delayed results	Barrier
		No real-time data	Barrier
	Usability	Difficult for students with identified LDs to complete independently	Barrier
		Difficult to access for caregivers	Barrier
		Difficult to access for multilingual speakers	Barrier
		Difficult to access for students without home support	Barrier
		Directions were clear	Facilitator
		Directions were easy to follow	Facilitator
		Easy to access	Facilitator
		Easy to use	Facilitator
		Hard for parents to tell if screeners were working properly	Barrier
		Hard to tell if completed	Barrier
		Not appropriate for legally blind students	Barrier
		Not appropriate for multilingual learners	Barrier
		Not motivating for students	Barrier
		Streamlined	Facilitator
		Student could complete it at home	Facilitator
		Students could complete it independently	Facilitator
		Students not finishing due to parent errors	Barrier
		Students unsure if answered a question	Barrier
		Students were already familiar with devices	Facilitator
		Too many steps for log in	Barrier
		Typing demands exceeded students’ ability	Barrier
Preparation for screening procedures	Communication	Confusion about start	Barrier
		Directions were available in multiple languages	Facilitator
		Execution was ineffective	Barrier
		Limited advanced notice	Barrier
		Not enough information for parents	Barrier
		Parents did not see value in the screeners	Barrier
		Unclear about implementation logistics	Barrier
		Unclear what to expect	Barrier
	Preparation timeline	Limited preparation time	Barrier
		Need time to go over screening with parents	Barrier
		Need time to look at screeners	Barrier
	Training	Inadequate training	Barrier
		Lack of practice session	Barrier
		Limited understanding of the screeners	Barrier
		Not enough information about screener functionality	Barrier
		Not enough information on logistics	Barrier
		Purpose of screeners was unclear	Barrier
		Questions left answered by researchers	Barrier
		Unable to answer questions for parents	Barrier
		Unable to see the screeners in advance	Barrier
		Unable to share examples with students	Barrier
		Unsure if applicable with ERC students	Barrier
Administration of the screeners	Mode of administration	Difficult to support families	Barrier
		Limited technical support	Barrier
		Not able to see students answering questions	Barrier
		Preference for in-person administration	Barrier
		Remote administration was difficult	Barrier
		Teacher felt discomfort with remote administration	Barrier
		Unable to monitor students	Barrier
	Screening timeline	Rushed timeframe	Barrier
		Timing was not ideal	Barrier
	Technical considerations	Administration via Seesaw	Barrier/Facilitator
		Audio issues	Barrier
		Completed screeners were not counted	Barrier
		Technical issues	Barrier
	Educator and family involvement	Difficult for families to administer	Barrier
		Easy to facilitate	Facilitator
		Parents were able to participate in the process	Facilitator
		Parents were confused	Barrier
		Preference for more involvement	Barrier
		Relying on families	Barrier
Demands on users		A lot to handle	Barrier
		Added responsibility for teacher	Barrier
		Amount of time	Barrier
		Easy role	Facilitator
		Need for last minute changes to routines with families	Barrier
		Overwhelmed due to number of different district-required trainings	Barrier
		Preference for outside administrators	Barrier
		Prior experience with the screeners	Facilitator
		The screening added to screen time	Barrier
Screening results	Validity of screening results	False positives	Barrier
		Impulsive response styles	Barrier
		Invalid due to mode of administration	Barrier
		Invalid for certain populations	Barrier
		Invalid results	Barrier
		Invalid results due to features of the screeners	Barrier
		Parents may have helped with answers	Barrier
	Use of screening results	Early identification	Facilitator
		Provides early literacy data	Facilitator
		Provides useful data	Facilitator