Databases in the Class Databases are structured stores of information they allow large amounts of information to be stored organised, sorted and searched.
The National Curriculum ICT programme of Study Finding thing out Specifies at Key Stage 1 that pupils should be taught to: • gather information from a variety of sources [for example, people, books, databases, CD ROMs, videos and TV] • enter and store information in a variety of forms [for example, storing information in a prepared database, saving work] • retrieve information that has been stored [for example, using a CD ROM, loading saved work
And at Key stage 2 Pupils should be taught: •to talk about what information they need and how they can find and use it [for example, searching the internet or a CD ROM, using printed material, asking people] •how to prepare information for development using ICT, including selecting suitable sources, finding information, classifying it and checking it for accuracy [for example, finding information from books or newspapers, creating a class database, classifying by characteristics and purposes, checking the spelling of names is consistent] •to interpret information, to check it is relevant and reasonable and to think about what might happen if there were any errors or omissions
The ICT Scheme of Work In Key Stage 1 data handling features in Unit 2C (finding information Unit 2E (Questions and answers)
In Key Stage 2 data handling features in •Unit 3C (Introduction to databases, •Unit 4C(Branching databases), •Unit 4D(Collecting and presenting information : questionniares and pie charts), •Unit 5B (Analysing Data and asking questions : using complex searches), •Unit 5C(Evaluating information, checking accuracy and questioning plausibility), • Unit 5D (Introduction to Spreadsheets), • Unit 6B (Spreadsheet Modelling) •6D - Using the internet to search large databases and to interpret information
What you need to know to be able to teach data handling • • • • •
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The types of databases used in school The appropriate opportunities in which to teach data handling The appropriate resources Preparation of suitable resources Exploration of the full range of data handling activities • Designed to facilitate learning about the processes and possibilities of data handling as well as the retrieval and manipulation of information Links between related knowledge, skills and understanding Skills to be able to model appropriate use of ICT Be able to demonstrate and assist children to identify the correct data
Different type of Database used in schools Branching tree (binary) • Posing questions to be answered yes/no • Distinguishing between shapes, minibeasts, people in our class,, musical instruments for example • Progressive elimination, until one item is left
Key features of Branching tree databases • Supports sorting and classification • Support data-handling activities across a range of subject areas • Provides opportunities for developing and refining questioning techniques
Flatfile or tabular databases Most familiar- one dimensional Can only see one record at a time (flatfile) or all records in a spreadsheet view (tabular • Card index file analogy • Comprises • records, arranged in • fields, holding • Data Data is entered into a flatfile database through a form which resembles a questionnaire and prompts for data to be added to each field
Flatfile database • Support searching to retrieve information, e.g. the names of the children in the class with brown eyes • Support more sophisticated searching on two variables, e.g. the name of the insect that has wings and 6 legs • Supporting by field, e.g. the number of red cars in the school car park • Supporting sorting and ordering • Support data-handling activities across a range of subject areas • Provides opportunities for developing and refining searching and sorting techniques
Relational • • • • •
Complex structure Information tagged Tagging interrelates data Greater flexibility in interrogation Features: • menus, indexes, keyword searching, hyperlinks
Practical Examples