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--- | --- | --- |\n| 1 – 2 years | In, on, another, up, down | • The child can follow simple spatial directions (e.g. teddy on table)\u003Cbr>• The child can use simple directional words\u003Cbr>• The child can use two or three concepts when communicating |\n| 2 – 3 years | Under, many, one, two, big, little, off, on, out of, together, away from, soon, later, wait | • The child can identify the difference between in and under, one and many\u003Cbr>• The child is beginning to understand time concepts (e.g. soon, later, wait)\u003Cbr>• The child can select three things that are the same and then not the same from a set of four objects\u003Cbr>• The child is starting to use describing words for colour and size |\n| 3 – 4 years | Empty, full, a lot, same, both, next to, beside, between, behind, in front, around | • The can child follow directions that include quantity concepts (e.g. empty, a lot)\u003Cbr>• The child can identify colours\u003Cbr>• The child can point to an item that’s different from the others |\n| 4 – 5 years | Big, bigger, biggest, yesterday, today, tomorrow, first, then, next, days of the week, last week, next week, different, nearest, through, thin, thick, whole, first, middle, last, hard, soft, smooth, rough, hot, cold | • The child can understand comparative and superlative describing words (e.g. big, bigger, biggest)\u003Cbr>• The child has a greater understanding of time\u003Cbr>• The child understands positional concepts (e.g. first, middle, last) |\n| 5 – 6 years | Opposite concepts: big/little, over/under, left/right. Number concepts up to 20, yesterday, tomorrow, backward, forward, nearest, corner, middle, first, second, third. | • The child can understand and answer “how are these the same/different?”\u003Cbr>• The child uses adjectives (describing words) to talk about something\u003Cbr>• The child uses a range of concepts at sentence level |\n\nAdapted from: LinguiSystems Guide to Communication Milestones by Janet R. Lanza and Lynn K. Flahive and Teaching Basic Concepts for Early School Success!by Keri Spielvogle, M.C. D. , CCC-SLP  \nSpeech and Checklist  \nLanguage Therapy – Concept Baseline  \n| Age | Concept | Never | Some of the time | Most of the time | Always |\n| --- | --- | --- | --- | --- | --- |\n| 1 – 2 years | in |  |  |  |  |\n|  | on |  |  |  |  |\n|  | another |  |  |  |  |\n|  | up |  |  |  |  |\n|  | down |  |  |  |  |\n| 2 – 3 years | under |  |  |  |  |\n|  | many |  |  |  |  |\n|  | one |  |  |  |  |\n|  | two |  |  |  |  |\n|  | big |  |  |  |  |\n|  | little |  |  |  |  |\n|  | off |  |  |  |  |\n|  | on |  |  |  |  |\n|  | out of |  |  |  |  |\n|  | together |  |  |  |  |\n|  | away from |  |  |  |  |\n|  | soon |  |  |  |  |\n|  | later |  |  |  |  |\n|  | wait |  |  |  |  |\n| 3 – 4 years | empty |  |  |  |  |\n|  | full |  |  |  |  |\n|  | a lot |  |  |  |  |\n|  | same |  |  |  |  |\n|  | both |  |  |  |  |\n\n\n|  | next to |  |  |  |  |\n| --- | --- | --- | --- | --- | --- |\n|  | beside |  |  |  |  |\n|  | between |  |  |  |  |\n|  | behind |  |  |  |  |\n|  | in front |  |  |  |  |\n|  | around |  |  |  |  |\n| 4 – 5 years | big |  |  |  |  |\n|  | bigger |  |  |  |  |\n|  | biggest |  |  |  |  |\n|  | yesterday |  |  |  |  |\n|  | today |  |  |  |  |\n|  | tomorrow |  |  |  |  |\n|  | first |  |  |  |  |\n|  | then |  |  |  |  |\n|  | next |  |  |  |  |\n|  | days of the week |  |  |  |  |\n|  | different |  |  |  |  |\n|  | nearest |  |  |  |  |\n|  | through |  |  |  |  |\n|  | thin |  |  |  |  |\n|  | thick |  |  |  |  |\n|  | whole |  |  |  |  |\n|  | first |  |  |  |  |\n|  | middle |  |  |  |  |\n|  | last |  |  |  |  |\n|  | hard |  |  |  |  |\n|  | soft |  |  |  |  |\n\n\n|  | smooth |  |  |  |  |\n| --- | --- | --- | --- | --- | --- |\n|  | rough |  |  |  |  |\n|  | hot |  |  |  |  |\n|  | cold |  |  |  |  |\n| 5 – 6 years | opposite concepts: big / little |  |  |  |  |\n|  | opposite concepts: over / under |  |  |  |  |\n|  | opposite concepts: left / right |  |  |  |  |\n|  | number concepts ","cbCaimu4BPWZDb2D","https://ap.wps.com/l/cbCaimu4BPWZDb2D","pdf",140819,"English","# Concept Milestones by Age\n## 1–2 years\n## 2–3 years\n## 3–4 years\n## 4–5 years\n## 5–6 years\n# Concept Baseline Checklist\n## Performance ratings (Never/Some of the time/Most of the time/Always)","[{\"question\":\"Which concept areas expand at later ages according to the milestones?\",\"answer\":\"By 4–5 and 5–6 years, children are expected to use comparative and superlative descriptions, positional concepts like first/middle/last, and broader sets such as opposites and number concepts up to 20.\"}]","Speech and Language Therapy - Concept Milestones | PDF",1790580322]